SCHEDULE OF PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($)	May 31, 2022	May 31, 2021
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	$ 66,391,904	$ 61,301,417
Less: Accumulated depreciation	(34,515,139)	(30,302,429)
Property, Plant and Equipment, net	31,876,765	30,998,988
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	57,341,906	52,292,733
Plant Buildingsand Land [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	7,020,543	6,970,949
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	1,487,398	1,487,398
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	$ 542,057	$ 550,337